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3 - 72 USING THE COMBISCOPE INSTRUMENTS
3.15.1.2 Questionable status data
BIT: MEANING:
0
VOLTage
This bit is set if a digital sample value is clipped at the maximum or minimum
value while a FETCh? query is done on the sample array. This bit is also set
if a FETCh? query did not succeed because the shape of the waveform did
not match the measure function request.
Example: FETCh:FREQuency? in the case of only half a sine wave.
4
TEMPerature
This bit is set by the instrument if the difference between the current
temperature and the temperature at the moment of the last calibration
exceeds a certain level. This is an indication that the instrument must be
calibrated. The temperature is sensed internally about half an hour after
power on. This bit is reset after power on and after calibrating.
8
CALibration
This bit is set by the instrument when an internal calibration did not complete
successfully. This bit is reset after power on and after successful calibration.
9
Overload 50
Ω
This bit is set by the instrument when any 50Ω input terminator is
overloaded. This bit is reset after power on, or if none of the input
terminators is overloaded.
Table 3.4 The Questionable Status bits
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
VOLTage
0
0
0
TEMPerature
0
0
0
CALibration
Overload 50Ω
0
0
0
0
0
0
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
STATus:QUEStionable:CONDition?
:PTRansition(?)
:NTRansition(?)
:EVENt?
:ENABle(?)
CONDition filter
EVENt
ENABle
ST7157
Figure 3.25 The Questionable Status structure